ATMEL AT24C01-10TI-2.7, AT24C01-10TI-2.5, AT24C01-10TI-1.8, AT24C01-10TI, AT24C01-10TC-2.7 Datasheet

Features

•

Low Voltage and Standard Voltage Operation

– 5.0 (VCC = 4.5V to 5.5V)
– 2.7 (VCC = 2.7V to 5.5V)
– 2.5 (VCC = 2.5V to 5.5V)
– 1.8 (VCC = 1.8V to 5.5V)

•

Internally Organized 128 x 8

•

2-Wire Serial Interface

•

Bidirectional Data Transfer Protocol

•

100 kHz (1.8V, 2.5V, 2.7V) and 400 kHz (5V) Compatibility

•

4-Byte Page Write Mode

•

Self-Timed Write Cycle (10 ms max)

•

High Reliability

– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years
– ESD Protection: >3000V

•

Automotive Grade and Extended Temperature Devices Available

•

8-Pin PDIP, 8-Pin MSOP, 8-Pin TSSOP and 8-Pin JEDEC SOIC Packages

2-Wire Serial
EEPROM

1K (128 x 8)

Description

The AT24C01 provides 1024 bits of serial electrically erasable and programmable
read only memory (EEPROM) organized as 128 words of 8 bits each. The device is
optimized for use in many industri al and comm ercial ap plicatio ns wher e low power
and low voltage operation are essential. The AT24C01 is available in space saving
8-pin PDIP, 8-pin MSOP, 8-pin TSSOP , and 8-pin JEDEC SOIC pac kages and is
accessed via a 2-wire serial interface. In addition, the entire family is available in 5.0V
(4.5V to 5.5V), 2.7V (2.7V to 5.5V), 2.5V (2.5V to 5.5V) and 1.8V (1.8V to 5.5V) ver­sions.

Pin Configurations

Pin Name Function

NC No Connect
SDA Serial Data
SCL Serial Clock Input
Test Test Input (GND or V

8-Pin PDIP

CC

NC
NC
NC

GND

)

8-Pin MSOP

8-Pin TSSOP

1
2
3
4

8-Pin SOIC

8

VCC

7

TEST

6

SCL

5

SDA

AT24C01

2-Wire, 1K
Serial EEPROM

NC
NC
NC

GND

1
2
3
4

8

VCC

7

TEST

6

SCL

5

SDA

NC
NC
NC

GND

1
2
3
4

VCC

8

TEST

7

SCL

6

SDA

5

Rev. 0134C–07/98

1

Absolute Maximum Ratings*

Operating Temperature.................................. -55°C to +125°C

Storage Temperature..................................... -65°C to +150°C

Voltage on Any Pin

with Respect to Ground.....................................-1.0V to +7.0V

Maximum Operating Voltage........................................... 6.25V

DC Output Current........................................................5.0 mA

Block Diagram

*NOTICE: Stresses beyond those listed under “Absolute

Maximum Ratings” may cause permanent dam­age to the de vic e. T his is a stres s r ating o nly an d
functional opera tion of the device at these or an y
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect
device reli abi li ty.

Pin Description

SERIAL CLOCK (SCL):

edge clock data into each EEPROM device and negative
edge clock data out of each device.

SERIAL DATA (SDA):

serial data transfer. This pin is open-drain driven and may
be wire-ORed with any number of other open-drain or open
collector devices.

2

The SCL input is used to positive

The SDA pin is bidirectional for

AT24C01

Memory Organization

AT24C01, 1K SERIAL EEPROM:

128 pages of 1 byte each. The 1K requires a 7-bit data
word address for random word addressing.

Internally organiz ed wi th

AT24C01

Pin Capacitance

Applicable over recommended operating range from TA = 25°C, f = 1.0 MHz, VCC = +1.8V.

Symbol T est Condit ion Max Units Condition

C

I/O

C

IN

DC Characteristics

Applicable over recommend ed operating range from: TAI = -40°C to +85°C, VCC = +1.8V to +5.5V, TAC = 0°C to +70°C,

= +1.8V to +5.5V (unless otherwise noted).

V

CC

Symbol Parameter Test Condition Min Typ Max Units

Input/Output Capacitance (SDA) 8 pF V

I/O

= 0V

Input Capacitance (A0, A1, A2, SCL) 6 pF VIN = 0V

V
V
V
V
I
I
I
I
I
I
I
I
V
V
V
V

CC1

CC2

CC3

CC4

CC

CC

SB1

SB2

SB3

SB4

LI

LO

IL

IH

OL2

OL1

Supply Voltage 1.8 5.5 V
Supply Voltage 2.5 5.5 V
Supply Voltage 2.7 5.5 V
Supply Voltage 4.5 5.5 V
Supply Current VCC = 5.0V READ at 100 KHz 0.4 1.0 mA
Supply Current VCC = 5.0V WRITE at 100 KHz 2.0 3.0 mA
Standby Current VCC = 1.8V VIN = VCC or V
Standby Current VCC = 2.5V VIN = VCC or V
Standby Current V

= 2.7V VIN = VCC or V

CC

Standby Current VCC = 5.0V VIN = VCC or V
Input Leakage Current VIN = VCC or V
Output Leakage Current V
Input Low Level
Input High Level

(1)

(1)

OUT

= V

CC

SS

SS

SS

SS

SS

or V

Output Low Level VCC = 3.0V IOL = 2.1 mA 0.4 V
Output Low Level VCC = 1.8V IOL = 0.15 mA 0.2 V

Note: 1. VIL min and VIH max are reference only and are not tested.

SS

0.6 3.0

1.4 4.0

1.6 4.0

8.0 18.0

0.10 3.0

0.05 3.0

µ
µ
µ
µ
µ
µ

-0.6 VCC × 0.3 V

VCC × 0.7 VCC + 0.5 V

A
A
A
A
A
A

3

AC Characteristics

Applicable over recomme nded operating r ange from TA = -40°C to +85°C, VCC = +1.8V to +5.5V, CL = 1 TTL Gate and
100 pF (unless otherwise noted).

2.7-, 2.5-, 1.8-volt 5.0-volt

Symbol Parameter

f

SCL

t

LOW

t

HIGH

t

I

t

AA

t

BUF

t

HD.STA

t

SU.STA

t

HD.DAT

t

SU.DAT

t

R

t

F

t

SU.STO

t

DH

t

WR

Endurance

Note: 1. This parameter is characterized and is not 100% tested.

(1)

Clock Frequency, SCL 100 400 KHz
Clock Pulse Width Low 4.7 1.2
Clock Pulse Width High 4.0 0.6
Noise Suppression Time
Clock Low to Data Out Valid 0.1 4.5 0.1 0.9
Time the bus must be free before a new

transmission can start
Start Hold Time 4.0 0.6
Start Set-up Time 4.7 0.6
Data In Hold Time 0 0
Data In Set-up Time 200 100 ns
Inputs Rise Time
Inputs Fall Time
Stop Set-up Time 4.7 0.6
Data Out Hold Time 100 50 ns
Write Cycle Time 10 10 ms

5.0V, 25°C, Page Mode 1M 1M

(1)

(1)

(1)

(1)

100 50 ns

4.7 1.2

1.0 0.3

300 300 ns

UnitsMin Max Min Max

µ

s

µ

s

µ

s

µ

s

µ

s

µ

s

µ

s

µ

s

µ

s

Write

Cycles

Device Operation

CLOCK and DATA TRANSITIONS:

mally pulled high wi th an ex ter na l dev ic e. Dat a o n t he SDA
pin may chan ge o nly duri ng S CL l ow t ime per iods (refe r t o
Data Validity timing diagram). Data changes during S CL
high periods will indicate a start or stop condition as
defined below.

START CONDITION:

A high-to-low transition of SDA with
SCL high is a start condition which must precede any other
command (refer to Start and Stop Definition timing dia­gram).

STOP CONDITION:

A low-to-high transition of SDA with
SCL high is a stop condition which terminates all communi­cations. After a read sequence, the stop comm and will
place the EEPROM in a standby power mode (refer to Start
and Stop Definition timing diagram).

ACKNOWLEDGE:

All addresses and data words are seri­ally transmitted to and from the EEPROM in 8-bit words.
Any device on the system bus receiving data (w hen com-

4

AT24C01

The SDA pin is nor-

municating with the EEPROM) must pull the SDA bus low
to acknowledge that it has successfully received each
word. This must happen during the ninth clock cycle after
each word received and after all other system devices have
freed the SDA bus. The EEPROM will likewise ackno wl­edge by pulling SDA low after receiving each address or
data word (refer to Acknowledge Response from Receiver
timing diagram).

STANDBY MODE:

The AT24C01 features a low power
standby mode which is enabled: (a) upon power-up and (b)
after the receipt of the STOP bit and the completi on of any
internal operations.

MEMORY RESET:

After an interruption in protocol, power
loss or system reset, any 2-wire part can be reset by follow­ing these steps:

(a) Clock up to 9 cycles, (b) look for SDA high in each cycle
while SCL is high and then (c) create a start condition as
SDA is high.

Bus Timing
SCL: Serial Clock, SDA: Serial Data I/O

Write Cycle Timing
SCL: Serial Clock, SDA: Serial Data I/O

AT24C01

SCL

SDA

Note: 1. The write cycle time tWR is the time from a valid stop condition of a write sequence to the end of the internal clear/write

cycle.

8th BIT ACK

WORD n

STOP

CONDITION

t

(1)

WR

START

CONDITION

5

Data Validity

Start and Stop Definition

Output Acknowledge

6

AT24C01

AT24C01

Write Operations

BYTE WRITE:

requires a 7-bit data word address and a low write bit. Upon
receipt of this address, th e EEPROM will again respond
with a zero and then clock in the first 8-bit data word. Fol­lowing receipt of the 8-b it da ta wo rd, the EE PROM will out­put a zero and the addressing device, such as a
microcontroller, must te rminate th e write sequ ence with a
stop condition. At this time the EEPROM enters an inter­nally-timed write cycle to the nonvolatile memory. All inputs
are disabled during this wr ite cycl e , t
will not respond until the write is complete (refer to Figure

1).

PAGE WRITE:

write.
A page write is initiated the same as a byte write but the

microcontroller does not send a stop condition after the first
data word is clocked in. Instead, after the EEPROM
acknowledges receipt of the first data word, the microcon­troller can transmit up to three more d ata words. Th e
EEPROM will respond with a zero after each data word
received. Th e microcontr oller must ter minate the pag e
write sequence with a stop condition (refer to Figure 2).

The data word address lower 2 bits are internally incre­mented following the rece ipt of each data word. The hig her
five data word address bits are not incremented, retaining
the memory page row location. When the word address,
internally ge nerated, r eaches th e page boun dary, the fo l­lowing byte is pla ced at th e be ginnin g o f the same pa ge. If
more than four data words are transmitted to the EEPROM,
the data word address will “roll ov er” and previ ous data will
be overwritten.

ACKNOWLEDGE POLLING:

write cycle has started and the EEPROM inputs are dis­abled, acknowledge polling can be initiated. T his invol ves
sending a start condition followed by the device address
word. The read/write bit is repres entative of the operation
desired. Only if the internal write cycle has completed will
the EEPROM respond with a zero allowing the read or
write sequence to continue.

Following a start condition, a write operation

, and the EEPROM

WR

The AT24C01 is capable of a 4-byte page

Once the internally-time d

Read Operations

Read operations are initiated the same way as write opera­tions with the exception that the read/write select bit in the
device address word is set to one. There are two read
operations: byte read and sequential read.

BYTE READ:

followed by a 7-bit data word address and a high read bit.
The AT24C01 will respond with an acknowledge and then
serially output 8 data bits. The microcontroller does not
respond with a zero but does generate a following stop
condition (refer to Figure 3).

SEQUENTIAL READ:

same as a byt e rea d. Aft er the m icroc ontr oller rece ives a n
8-bit data word, it responds with an acknowledge. As long
as the EEPROM receives an acknowledge, it will continue
to increment the data w ord address and seria lly clock out
sequential data words. Whe n the memory addr ess limit is
reached, the data word address will “roll over” and the
sequential read will continue. The sequential read opera­tion is terminated whe n the microcontroller does not
respond with an input zero but does generate a following
stop condition (refer to Figure 4).

A byte read is initiated with a start condition

Sequential read s are initiate d the

Figure 1.

Byte Write

7

Figure 2.

Page Write

Figure 3.

Figure 4.

Byte Read

Sequential Read

8

AT24C01

Ordering Information

tWR (max)

(ms)

10 3000 18 400 AT24C01-10PC

10 1500 4 100 AT24C01-10PC-2.7

10 1000 4 100 AT24C01-10PC-2.5

10 800 3 100 AT24C01-10PC-1.8

ICC (max)

(µA)

3000 18 400 AT24C01-10PI

1500 4 100 AT24C01-10PI-2.7

1000 4 100 AT24C01-10PI-2.5

800 3 100 AT24C01-10PI-1.8

ISB (max)

(µA)

f

MAX

(kHz) Ordering Code Package Operation Range

AT24C01-10SC
AT24C01-10MC
AT24C01-10TC

AT24C01-10SI
AT24C01-10MI
AT24C01-10TI

AT24C01-10SC-2.7
AT24C01-10MC-2.7
AT24C01-10TC-2.7

AT24C01-10SI-2.7
AT24C01-10MI-2.7
AT24C01-10TI-2.7

AT24C01-10SC-2.5
AT24C01-10MC-2.5
AT24C01-10TC-2.5

AT24C01-10SI-2.5
AT24C01-10MI-2.5
AT24C01-10TI-2.5

AT24C01-10SC-1.8
AT24C01-10MC-1.8
AT24C01-10TC-1.8

AT24C01-10SI-1.8
AT24C01-10MI-1.8
AT24C01-10TI-1.8

AT24C01

8P3
8S1
8M
8T

8P3
8S1
8M
8T

8P3
8S1
8M
8T

8P3
8S1
8M
8T

8P3
8S1
8M
8T

8P3
8S1
8M
8T

8P3
8S1
8M
8T

8P3
8S1
8M
8T

Commercial

(0°C to 70°C)

Industrial

(-40°C to 85°C)

Commercial

(0°C to 70°C)

Industrial

(-40°C to 85°C)

Commercial

(0°C to 70°C)

Industrial

(-40°C to 85°C)

Commercial

(0°C to 70°C)

Industrial

(-40°C to 85°C)

Package Type

8M 8-Lead, 0.118” Wide, Miniature Small Outline Package (MSOP)
8P3 8-Lead, 0.300" Wide, Plastic Dual Inline Package (PDIP)
8S1 8-Lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC)
8T 8-Lead, 0.170” Wide, Thin Shrink Small Outline Package (TSSOP)

Options

Blank Standard Operation (4.5V to 5.5V)

-2.7 Low-Voltage (2.7V to 5.5V)

-2.5 Low-Voltage (2.5V to 5.5V)

-1.8 Low-Voltage (1.8V to 5.5V)

9

Packaging Information

8M,

8-Lead, 0.118” Wide, Miniature Small Outline

Package (MSOP)

0.40 (0.016)

0.25 (0.010)

3.10 (0.122)

PIN 1

3.10 (0.122)

2.90 (0.114)

0.15 (0.006)

0.05 (0.002)

3.81

(0.150)

REF

4.90 (0.193)
REF

2.90 (0.114)

0.65 (0.026) TYP

1.10 (0.043)

0.97 (0.038)

0.23 (0.009)

0.13 (0.005)

8P3

, 8-Lead, 0.300” Wide, Plastic Dual Inline
Package (PDIP)
Dimensions in Inches and (Millimeters)

JEDEC STANDARD MS-001 BA

.400 (10.16)
.355 (9.02)

PIN

1

.280 (7.11)
.240 (6.10)

.037 (.940)

.300 (7.62) REF

.210 (5.33) MAX

SEATING

PLANE

.150 (3.81)
.115 (2.92)

.012 (.305)
.008 (.203)

.070 (1.78)
.045 (1.14)

.027 (.690)

.100 (2.54) BSC

.015 (.380) MIN

.022 (.559)
.014 (.356)

.325 (8.26)
.300 (7.62)

0

REF

15

.430 (10.9) MAX

8S1

, 8-Lead, 0.150” Wide, Plastic Gull Wing Small
Outline (JEDEC SOIC)
Dimensions in Inches and (Millimeters)

.020 (.508)
.013 (.330)

.244 (6.20)
.228 (5.79)

.068 (1.73)
.053 (1.35)

.010 (.254)
.007 (.203)

PIN 1

0
8

.157 (3.99)
.150 (3.81)

.050 (1.27) BSC

.196 (4.98)
.189 (4.80)

.010 (.254)
.004 (.102)

REF

.050 (1.27)
.016 (.406)

8T

, 8-Lead 0.170” Wide, Thin Shrink Small Outline
Package (TSSOP)
Dimensions in Millimeters and (Inches)*

PIN 1

6.50 (.256)

6.25 (.246)

0.30 (.012)

0.19 (.008)

3.10 (.122)

0

REF

8

2.90 (.114)

0.15 (.006)

0.05 (.002)

4.5 (.177)

4.3 (.169)

0.75 (.030)

0.45 (.018)

1.20 (.047) MAX

0.20 (.008)

0.09 (.004)

1.05 (.041)

0.80 (.033)

.65 (.026) BSC

*Controlling dimension: millimeters

10

AT24C01